diff --git a/settings/ajax/createuser.php b/settings/ajax/createuser.php
index 205958f88d..ccc2a5d402 100644
--- a/settings/ajax/createuser.php
+++ b/settings/ajax/createuser.php
@@ -41,7 +41,7 @@ try {
 	OC_JSON::success(array("data" =>
 				array(
 					"username" => $username,
-					"groups" => implode( ", ", OC_Group::getUserGroups( $username )))));
+					"groups" => OC_Group::getUserGroups( $username ))));
 } catch (Exception $exception) {
 	OC_JSON::error(array("data" => array( "message" => $exception->getMessage())));
 }
diff --git a/settings/js/users.js b/settings/js/users.js
index 6a8afc4ca3..948849fe53 100644
--- a/settings/js/users.js
+++ b/settings/js/users.js
@@ -89,10 +89,10 @@ var UserList = {
 		tr.attr('data-displayName', displayname);
 		tr.find('td.name').text(username);
 		tr.find('td.displayName > span').text(displayname);
-		var groupsSelect = $('<select multiple="multiple" class="groupsselect" data-placehoder="Groups" title="' + t('settings', 'Groups') + '"></select>').attr('data-username', username).attr('data-user-groups', groups);
+		var groupsSelect = $('<select multiple="multiple" class="groupsselect" data-placehoder="Groups" title="' + t('settings', 'Groups') + '"></select>').attr('data-username', username).attr('data-user-groups', [groups]);
 		tr.find('td.groups').empty();
 		if (tr.find('td.subadmins').length > 0) {
-			var subadminSelect = $('<select multiple="multiple" class="subadminsselect" data-placehoder="subadmins" title="' + t('settings', 'Group Admin') + '">').attr('data-username', username).attr('data-user-groups', groups).attr('data-subadmin', subadmin);
+			var subadminSelect = $('<select multiple="multiple" class="subadminsselect" data-placehoder="subadmins" title="' + t('settings', 'Group Admin') + '">').attr('data-username', username).attr('data-user-groups', [groups]).attr('data-subadmin', [subadmin]);
 			tr.find('td.subadmins').empty();
 		}
 		$.each(this.availableGroups, function (i, group) {
@@ -227,7 +227,7 @@ var UserList = {
 		var user = element.attr('data-username');
 		if ($(element).attr('class') === 'groupsselect') {
 			if (element.data('userGroups')) {
-				checked = String(element.data('userGroups')).split(', ');
+				checked = element.data('userGroups');
 			}
 			if (user) {
 				var checkHandeler = function (group) {
@@ -244,11 +244,10 @@ var UserList = {
 							group: group
 						},
 						function (response) {
-							if(response.status === 'success') {
-								if(UserList.availableGroups.indexOf(response.data.groupname) === -1 && response.data.action === 'add') {
-									UserList.availableGroups.push(response.data.groupname);
-								}
-							} else {
+							if(response.status === 'success' && UserList.availableGroups.indexOf(response.data.groupname) === -1 && response.data.action === 'add') {
+								UserList.availableGroups.push(response.data.groupname);
+							}
+							if(response.data.message) {
 								OC.Notification.show(response.data.message);
 							}
 						}
@@ -282,7 +281,7 @@ var UserList = {
 		}
 		if ($(element).attr('class') === 'subadminsselect') {
 			if (element.data('subadmin')) {
-				checked = String(element.data('subadmin')).split(', ');
+				checked = element.data('subadmin');
 			}
 			var checkHandeler = function (group) {
 				if (group === 'admin') {
@@ -321,7 +320,7 @@ var UserList = {
 $(document).ready(function () {
 
 	UserList.doSort();
-	UserList.availableGroups = $('#content table').attr('data-groups').split(', ');
+	UserList.availableGroups = $('#content table').data('groups');
 	$('tbody tr:last').bind('inview', function (event, isInView, visiblePartX, visiblePartY) {
 		OC.Router.registerLoadedCallback(function () {
 			UserList.update();
@@ -450,7 +449,7 @@ $(document).ready(function () {
 						t('settings', 'Error creating user'));
 				} else {
 					if (result.data.groups) {
-						var addedGroups = result.data.groups.split(', ');
+						var addedGroups = result.data.groups;
 						UserList.availableGroups = $.unique($.merge(UserList.availableGroups, addedGroups));
 					}
 					if($('tr[data-uid="' + username + '"]').length === 0) {
diff --git a/settings/templates/users.php b/settings/templates/users.php
index 4ddef3ff1b..22450fdf25 100644
--- a/settings/templates/users.php
+++ b/settings/templates/users.php
@@ -78,7 +78,7 @@ $_['subadmingroups'] = array_flip($items);
 	</div>
 </div>
 
-<table class="hascontrols" data-groups="<?php p(implode(', ', $allGroups));?>">
+<table class="hascontrols" data-groups="<?php p(json_encode($allGroups));?>">
 	<thead>
 		<tr>
 			<th id='headerName'><?php p($l->t('Username'))?></th>
@@ -108,7 +108,7 @@ $_['subadmingroups'] = array_flip($items);
 			<td class="groups"><select
 				class="groupsselect"
 				data-username="<?php p($user['name']) ;?>"
-				data-user-groups="<?php p($user['groups']) ;?>"
+				data-user-groups="<?php p(json_encode($user['groups'])) ;?>"
 				data-placeholder="groups" title="<?php p($l->t('Groups'))?>"
 				multiple="multiple">
 					<?php foreach($_["groups"] as $group): ?>
@@ -120,7 +120,7 @@ $_['subadmingroups'] = array_flip($items);
 			<td class="subadmins"><select
 				class="subadminsselect"
 				data-username="<?php p($user['name']) ;?>"
-				data-subadmin="<?php p($user['subadmin']);?>"
+				data-subadmin="<?php p(json_encode($user['subadmin']));?>"
 				data-placeholder="subadmins" title="<?php p($l->t('Group Admin'))?>"
 				multiple="multiple">
 					<?php foreach($_["subadmingroups"] as $group): ?>
diff --git a/settings/users.php b/settings/users.php
index ba79ae93b2..213d1eecfd 100644
--- a/settings/users.php
+++ b/settings/users.php
@@ -54,15 +54,16 @@ foreach($accessibleusers as $uid => $displayName) {
 	$name = $displayName;
 	if ( $displayName !== $uid ) {
 		$name = $name . ' ('.$uid.')';
-	} 
-	
+	}
+
 	$users[] = array(
 		"name" => $uid,
-		"displayName" => $displayName, 
-		"groups" => join( ", ", /*array_intersect(*/OC_Group::getUserGroups($uid)/*, OC_SubAdmin::getSubAdminsGroups(OC_User::getUser()))*/),
-		'quota'=>$quota,
-		'isQuotaUserDefined'=>$isQuotaUserDefined,
-		'subadmin'=>implode(', ', OC_SubAdmin::getSubAdminsGroups($uid)));
+		"displayName" => $displayName,
+		"groups" => OC_Group::getUserGroups($uid),
+		'quota' => $quota,
+		'isQuotaUserDefined' => $isQuotaUserDefined,
+		'subadmin' => OC_SubAdmin::getSubAdminsGroups($uid),
+	);
 }
 
 foreach( $accessiblegroups as $i ) {